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Flutter---通用子项的图片个数不同（2）

news 2026/6/28 20:48:44

效果图

说明：版本1的中心水果图片只是简单的排列，这个版本是让图片进行两两交叠

实现步骤

1.构建网格子项

Widget _buildInAudioItem({ required String name, required List<String> images, //用列表接收图片 required VoidCallback onTap, double imageSize = 40, }) { return Column( mainAxisSize: MainAxisSize.min, children: [ GestureDetector( onTap: onTap, child: Container( height: 150, width: 155, decoration: BoxDecoration( color: Color(0xFF1B1D2E), borderRadius: BorderRadius.circular(10), ), child: Center( child: _buildImageLayout(images, imageSize: imageSize), //传递图片和图片尺寸 ), ), ), SizedBox(height: 8), Container( height: 30, child: Text( name, style: TextStyle(color: Colors.white, fontSize: 12), textAlign: TextAlign.center, maxLines: 2, overflow: TextOverflow.ellipsis, ), ), ], ); }

2.构建图片布局 ******

Widget _buildImageLayout(List<String> images, {double imageSize = 40}) { int count = images.length; //图片个数 if (count == 1) { // 单个图片居中显示 return Container( height: imageSize, width: imageSize, decoration: BoxDecoration( color: Color(0xFF55596D), borderRadius: BorderRadius.circular(imageSize / 2), ), child: Center( child: Image.asset( images[0], width: imageSize * 0.5, height: imageSize * 0.5, ), ), ); } else if (count == 2) { // 两个图片交叠显示 double overlap = imageSize * 0.2; // 交叠宽度 double totalWidth = imageSize * 2 - overlap; return Container( width: totalWidth, child: Stack( children: [ // 第一个图片在左边 Positioned( top: 55, left: 0, child: Container( height: imageSize, width: imageSize, decoration: BoxDecoration( color: Color(0xFF55596D).withOpacity(0.8), borderRadius: BorderRadius.circular(imageSize / 2), ), child: Center( child: Image.asset( images[0], width: imageSize * 0.5, height: imageSize * 0.5, ), ), ), ), // 第二个图片在右边，交叠一部分 Positioned( top: 55, left: imageSize - overlap, child: Container( height: imageSize, width: imageSize, decoration: BoxDecoration( color: Color(0xFF55596D).withOpacity(0.8), borderRadius: BorderRadius.circular(imageSize / 2), ), child: Center( child: Image.asset( images[1], width: imageSize * 0.5, height: imageSize * 0.5, ), ), ), ), ], ), ); } else if (count == 3) { // 三个图片交叠显示 double overlap = imageSize * 0.2; // 交叠宽度 double totalWidth = imageSize + (imageSize - overlap) * 2; return Container( width: totalWidth, child: Stack( children: [ // 第一个图片在最左边 Positioned( top:55, left: 0, child: Container( height: imageSize, width: imageSize, decoration: BoxDecoration( color: Color(0xFF55596D).withOpacity(0.8), borderRadius: BorderRadius.circular(imageSize / 2), ), child: Center( child: Image.asset( images[0], width: imageSize * 0.5, height: imageSize * 0.5, ), ), ), ), // 第二个图片在中间 Positioned( top:55, left: imageSize - overlap, child: Container( height: imageSize, width: imageSize, decoration: BoxDecoration( color: Color(0xFF55596D).withOpacity(0.8), borderRadius: BorderRadius.circular(imageSize / 2), ), child: Center( child: Image.asset( images[1], width: imageSize * 0.5, height: imageSize * 0.5, ), ), ), ), // 第三个图片在最右边 Positioned( top:55, left: (imageSize - overlap) * 2, child: Container( height: imageSize, width: imageSize, decoration: BoxDecoration( color: Color(0xFF55596D).withOpacity(0.8), borderRadius: BorderRadius.circular(imageSize / 2), ), child: Center( child: Image.asset( images[2], width: imageSize * 0.5, height: imageSize * 0.5, ), ), ), ), ], ), ); } return SizedBox.shrink(); } }

3.使用子项构建表格

Widget buildInAudioList() { return Padding( padding: EdgeInsets.symmetric(horizontal: 10, vertical: 40), child: GridView.count( crossAxisCount: 2, crossAxisSpacing: 15, mainAxisSpacing: 5, childAspectRatio: 155 / 180, shrinkWrap: true, children: [ _buildInAudioItem( name: "苹果", images: ["assets/images/apple.png"], onTap: () => print("点击苹果"), ), _buildInAudioItem( name: "苹果+香蕉", images: ["assets/images/apple.png", "assets/images/banana.png"], onTap: () => print("点击苹果+香蕉"), ), _buildInAudioItem( name: "苹果、香蕉、樱桃", images: ["assets/images/apple.png", "assets/images/banana.png", "assets/images/cherry.png"], onTap: () => print("点击苹果、香蕉、樱桃"), ), _buildInAudioItem( name: "苹果", images: ["assets/images/apple.png"], onTap: () => print("苹果"), ), ], ), ); }

代码实例

import 'package:flutter/cupertino.dart'; import 'package:flutter/material.dart'; class DemoPage extends StatefulWidget { const DemoPage({super.key}); @override State<DemoPage> createState() => _DemoPageState(); } class _DemoPageState extends State<DemoPage> { @override Widget build(BuildContext context) { return Scaffold( backgroundColor: Colors.transparent, body: Container( width: double.infinity, height: double.infinity, decoration: const BoxDecoration( gradient: LinearGradient( begin: Alignment.topCenter, end: Alignment.bottomCenter, colors: [ Color(0xFF060618), Color(0xFF070A23), ], ), ), child: buildInAudioList(), ), ); } Widget buildInAudioList() { return Padding( padding: EdgeInsets.symmetric(horizontal: 10, vertical: 40), child: GridView.count( crossAxisCount: 2, crossAxisSpacing: 15, mainAxisSpacing: 5, childAspectRatio: 155 / 180, shrinkWrap: true, children: [ _buildInAudioItem( name: "苹果", images: ["assets/images/apple.png"], onTap: () => print("点击苹果"), ), _buildInAudioItem( name: "苹果+香蕉", images: ["assets/images/apple.png", "assets/images/banana.png"], onTap: () => print("点击苹果+香蕉"), ), _buildInAudioItem( name: "苹果、香蕉、樱桃", images: ["assets/images/apple.png", "assets/images/banana.png", "assets/images/cherry.png"], onTap: () => print("点击苹果、香蕉、樱桃"), ), _buildInAudioItem( name: "苹果", images: ["assets/images/apple.png"], onTap: () => print("苹果"), ), ], ), ); } // 网格子项 Widget _buildInAudioItem({ required String name, required List<String> images, //用列表接收图片 required VoidCallback onTap, double imageSize = 40, }) { return Column( mainAxisSize: MainAxisSize.min, children: [ GestureDetector( onTap: onTap, child: Container( height: 150, width: 155, decoration: BoxDecoration( color: Color(0xFF1B1D2E), borderRadius: BorderRadius.circular(10), ), child: Center( child: _buildImageLayout(images, imageSize: imageSize), //传递图片和图片尺寸 ), ), ), SizedBox(height: 8), Container( height: 30, child: Text( name, style: TextStyle(color: Colors.white, fontSize: 12), textAlign: TextAlign.center, maxLines: 2, overflow: TextOverflow.ellipsis, ), ), ], ); } // 构建图片布局 Widget _buildImageLayout(List<String> images, {double imageSize = 40}) { int count = images.length; //图片个数 if (count == 1) { // 单个图片居中显示 return Container( height: imageSize, width: imageSize, decoration: BoxDecoration( color: Color(0xFF55596D), borderRadius: BorderRadius.circular(imageSize / 2), ), child: Center( child: Image.asset( images[0], width: imageSize * 0.5, height: imageSize * 0.5, ), ), ); } else if (count == 2) { // 两个图片交叠显示 double overlap = imageSize * 0.2; // 交叠宽度 double totalWidth = imageSize * 2 - overlap; return Container( width: totalWidth, child: Stack( children: [ // 第一个图片在左边 Positioned( top: 55, left: 0, child: Container( height: imageSize, width: imageSize, decoration: BoxDecoration( color: Color(0xFF55596D).withOpacity(0.8), borderRadius: BorderRadius.circular(imageSize / 2), ), child: Center( child: Image.asset( images[0], width: imageSize * 0.5, height: imageSize * 0.5, ), ), ), ), // 第二个图片在右边，交叠一部分 Positioned( top: 55, left: imageSize - overlap, child: Container( height: imageSize, width: imageSize, decoration: BoxDecoration( color: Color(0xFF55596D).withOpacity(0.8), borderRadius: BorderRadius.circular(imageSize / 2), ), child: Center( child: Image.asset( images[1], width: imageSize * 0.5, height: imageSize * 0.5, ), ), ), ), ], ), ); } else if (count == 3) { // 三个图片交叠显示 double overlap = imageSize * 0.2; // 交叠宽度 double totalWidth = imageSize + (imageSize - overlap) * 2; return Container( width: totalWidth, child: Stack( children: [ // 第一个图片在最左边 Positioned( top:55, left: 0, child: Container( height: imageSize, width: imageSize, decoration: BoxDecoration( color: Color(0xFF55596D).withOpacity(0.8), borderRadius: BorderRadius.circular(imageSize / 2), ), child: Center( child: Image.asset( images[0], width: imageSize * 0.5, height: imageSize * 0.5, ), ), ), ), // 第二个图片在中间 Positioned( top:55, left: imageSize - overlap, child: Container( height: imageSize, width: imageSize, decoration: BoxDecoration( color: Color(0xFF55596D).withOpacity(0.8), borderRadius: BorderRadius.circular(imageSize / 2), ), child: Center( child: Image.asset( images[1], width: imageSize * 0.5, height: imageSize * 0.5, ), ), ), ), // 第三个图片在最右边 Positioned( top:55, left: (imageSize - overlap) * 2, child: Container( height: imageSize, width: imageSize, decoration: BoxDecoration( color: Color(0xFF55596D).withOpacity(0.8), borderRadius: BorderRadius.circular(imageSize / 2), ), child: Center( child: Image.asset( images[2], width: imageSize * 0.5, height: imageSize * 0.5, ), ), ), ), ], ), ); } return SizedBox.shrink(); } }

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